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//
// Novell.Directory.Ldap.Extensions.SetReplicationFilterRequest.cs
//
// Author:
//   Sunil Kumar (Sunilk@novell.com)
//
// (C) 2003 Novell, Inc (http://www.novell.com)
//

using System;
using System.IO;
using Novell.Directory.Ldap.Asn1;
using Novell.Directory.Ldap.Utilclass;

namespace Novell.Directory.Ldap.Extensions
{
    /// <summary>
    ///     Sets the Replication filter for all replicas on the server.
    ///     The filter specified is a an array of classnames-attribute names pairs.
    ///     To set the filter for all replicas on the connected server, you must
    ///     create an instance of this class and then call the
    ///     extendedOperation method with this object as the required
    ///     LdapExtendedOperation parameter.
    ///     The SetReplicationFilterRequest extension uses the following OID:
    ///     2.16.840.1.113719.1.27.100.35
    ///     The requestValue has the following format:
    ///     requestValue ::=
    ///     serverName  LdapDN
    ///     SEQUENCE of SEQUENCE {
    ///     classname  OCTET STRING
    ///     SEQUENCE of ATTRIBUTES
    ///     }
    ///     where
    ///     ATTRIBUTES:: OCTET STRING
    /// </summary>
    public class SetReplicationFilterRequest : LdapExtendedOperation
    {
        /// <summary>
        ///     Constructs an extended operations object which contains the ber encoded
        ///     replication filter.
        /// </summary>
        /// <param name="serverDN">
        ///     The server on which the replication filter needs to be set
        /// </param>
        /// <param name="replicationFilter">
        ///     An array of String Arrays. Each array starting with
        ///     a class name followed by the attribute names for that class that should comprise
        ///     the replication filter.
        /// </param>
        /// <exception>
        ///     LdapException A general exception which includes an error
        ///     message and an Ldap error code.
        /// </exception>
        public SetReplicationFilterRequest(string serverDN, string[][] replicationFilter)
            : base(ReplicationConstants.SET_REPLICATION_FILTER_REQ, null)
        {
            try
            {
                if ((object) serverDN == null)
                    throw new ArgumentException(ExceptionMessages.PARAM_ERROR);

                var encodedData = new MemoryStream();
                var encoder = new LBEREncoder();

                var asn1_serverDN = new Asn1OctetString(serverDN);

                // Add the serverDN to encoded data
                asn1_serverDN.encode(encoder, encodedData);

                // The toplevel sequenceOF
                var asn1_replicationFilter = new Asn1SequenceOf();

                if (replicationFilter == null)
                {
                    asn1_replicationFilter.encode(encoder, encodedData);
                    setValue(SupportClass.ToSByteArray(encodedData.ToArray()));
                    return;
                }

                var i = 0;
                // for every element in the array
                while (i < replicationFilter.Length && replicationFilter[i] != null)
                {
                    // The following additional Sequence is not needed
                    // as defined by the Asn1. But the server and the
                    // C client are encoding it. Remove this when server
                    // and C client are fixed to conform to the published Asn1.
                    var buginAsn1Representation = new Asn1Sequence();

                    // Add the classname to the sequence -
                    buginAsn1Representation.add(new Asn1OctetString(replicationFilter[i][0]));

                    // Start a sequenceOF for attributes
                    var asn1_attributeList = new Asn1SequenceOf();

                    // For every attribute in the array - remember attributes start after
                    // the first element
                    var j = 1;
                    while (j < replicationFilter[i].Length && (object) replicationFilter[i][j] != null)
                    {
                        // Add the attribute name to the inner SequenceOf
                        asn1_attributeList.add(new Asn1OctetString(replicationFilter[i][j]));
                        j++;
                    }


                    // Add the attributeList to the sequence - extra add due to bug
                    buginAsn1Representation.add(asn1_attributeList);
                    asn1_replicationFilter.add(buginAsn1Representation);
                    i++;
                }

                asn1_replicationFilter.encode(encoder, encodedData);
                setValue(SupportClass.ToSByteArray(encodedData.ToArray()));
            }
            catch (IOException ioe)
            {
                throw new LdapException(ExceptionMessages.ENCODING_ERROR, LdapException.ENCODING_ERROR, null, ioe);
            }
        }
    }
}